System for Optimizing Electricity Use from an Electric Grid and Related Method

• US 20160009192A1
• Filed: 06/19/2015
• Published: 01/14/2016
• Est. Priority Date: 07/11/2014
• Status: Active Grant

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Zhang, Li, Jabbari, Faryar, Samuelsen, Scott
• Granted Patent: US 10,065,520 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/64 Optimising energy costs, e.g. responding to electricity rates
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: G06Q 20/145 Payments according to the detected use or quantity
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: G07F 15/005 dispensed for the electrical charging of vehicles electrical charging as such, B60L50/00
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A method of optimizing electricity use from an electric grid is disclosed. The method includes formulating a target load using a cost function for the electric grid, broadcasting a cost signal to the electric device based on the target load, receiving a charging profile from the electric device based on the cost signal, aggregating a demand profile for the electricity use based on the charging profile, determining an updated cost signal based on the demand profile, and broadcasting the updated cost signal to another electric device. The electric device is chargeable electric device, such as a plug-in electric vehicle (PEV). The electric device determines the charging profile only once based on the cost signal, and is charged at maximum power.

Claims

1. A system for optimizing electricity use from an electric grid, said system comprising:

a grid operator configured to formulate a target load using a cost function for said electric grid;

said grid operator configured to broadcast a cost signal to said electric device based on said target load;

a server in said grid operator receiving a charging profile from said electric device based on said cost signal;

an aggregator in said grid operator aggregating a demand profile for said electricity use based on said charging profile;

said grid operator configured to determine an updated cost signal based on said demand profile;

said grid operator configured to broadcast said updated cost signal to another electric device.

2. The system of claim 1, further comprising means for plugging an electric device into said electric grid.

3. The system of claim 1, wherein said electric device is a chargeable electric device.

4. The system of claim 1, wherein said electric device is a plug-in electric vehicle (PEV).

5. The system of claim 1, wherein said target load is configured by said grid operator to fill a primary electricity demand valley.

6. The system of claim 1, wherein said target load is configured by said grid operator to fill a secondary electricity demand valley.

7. The system of claim 1, wherein said target load is configured by said grid operator to reduce a ramp rate for said electric grid.

8. The system of claim 1, wherein said electric device determines said charging profile only once based on said cost signal.

9. The system of claim 1, wherein said system is configured to charge said electric device at a maximum charging rate.

10. The system of claim 1, wherein said grid operator is configured to determine said updated cost signal at set time intervals.

11. The system of claim 1, wherein said grid operator is configured to determine said updated cost signal for set number of registered electric devices.

12. A method of optimizing electricity use from an electric grid, said method comprising:

formulating a target load using a cost function for said electric grid;

broadcasting a cost signal to said electric device based on said target load;

receiving a charging profile from said electric device based on said cost signal;

aggregating a demand profile for said electricity use based on said charging profile;

determining an updated cost signal based on said demand profile;

broadcasting said updated cost signal to another electric device.

13. The method of claim 12, further comprising plugging in an electric device to said electric grid prior to said formulating said target load.

14. The method of claim 12, wherein said electric device is a chargeable electric device.

15. The method of claim 12, wherein said electric device is a plug-in electric vehicle (PEV).

16. The method of claim 12, wherein said electric device determines said charging profile only once based on said cost signal to avoid iterative communication between said electric device and said grid operator.

17. The method of claim 12, further comprising said target load filling a primary electricity demand valley.

18. The method of claim 12, further comprising said target load filling a secondary electricity demand valley.

19. The method of claim 12, wherein said determining said updated cost signal is performed at set time intervals.

20. The method of claim 12, wherein said determining said updated cost signal is performed for set number of registered electric devices.